Doing away with the I-notion is the same as not desiring the personal attainment of enlightenment.
Not desiring that (the 'last desire', the 'last barrier') is 'having it', for 'having it' is in any case merely being rid of that which concealed what is forever that which alone we are.
Therefore not desiring personal attainment of that is at the same time the elimination of the I-notion which constitutes its concealment.
The idea of liberation automatically inhibits the simple realisation that we are free.
Note: Free, we are not number One, the first of all our objects, but Zero - their universal and Absolute Subject. This is illustrated by the famous 'Tenth Man' story.